now your throwing an awful lot of hot air around into an engine that is known to run hot anyway.
Without proper thinking its a recipy for disaster.
The standard radiator is around 30mm thick and does a decent job for a standard car but very quickly reaches its limit once your running alot of power.
Alot of people choose to keep the stock one for a while when running single turbo, the reason for this is 2 fold.
1. because most single turbos are only oil cooled you have one less hot think to dump heat back into the water system.
2. because of the larger rear end of a single compared to the twins theres less restriction for the heat leaving the engine, this in turn helps get the heat out of the rotary engine faster, this was something i read and im sure theres a better way of typing it, but ill leave that for improvement.
Now im not just gonna run 400bhp on this engine, im looking nearly double that, so its silly to believe that the stock rad can cope.
Luckily the ebay rads you see for sale are only £120 and are proven to work on big power cars, they are 58mm thick which is a big improvement and are cheap as a bonus.
The car runs 2 oil coolers as stock and they are pretty good at controlling oil temps even on heavily tuned rx7s.
The next thing to come up is air temps, running 30psi+ on a massive turbo will cause high temps.
To get over this i decided to use the cossie way of dealing with them and get a rs500 intercooler, now normally they are 50mm in depth, this is fine im sure for 500bhp(i know rod used one at 600bhp) but im going for more than that and want to make life easier for myself so im going for a 70mm core version which should give me the cooling that i require.
here below is a picture of the setup...only in paint but gives you an idea
http://img43.imageshack.us/img43/5433/enginemockup.jpg
now blue is intercooler, red is radiator and green is fans, the grey is the aluminum ducting which ill go all around the cooler so that no air is wasted and will then be forced through the rad aswell
also it will be keeping a stock front end, the front opening will give enough air to the cooler as the ducting will make a funnel shape to the cooler, if air looses a few mph before it gets to the cooler it wont matter at 150mph+
ok fueling next